Add buganizer component for CtsBackupHostTestCases

Buganizer component will be used to file bugs related to
CtsBackupHostTestCases

Test: Tree Hugger
Change-Id: I85135aaf4e60e3680ef29b2406e3d0bfc72d4743
diff --git a/hostsidetests/backup/OWNERS b/hostsidetests/backup/OWNERS
index 3637e32..c28c4d8 100644
--- a/hostsidetests/backup/OWNERS
+++ b/hostsidetests/backup/OWNERS
@@ -1,3 +1,4 @@
+# Bug component: 41666
 # Use this reviewer by default.
 br-framework-team+reviews@google.com